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New class for Hidden Track Algorithm (HTA) devoted to the reconstruction of Cherenkov...
[u/mrichter/AliRoot.git] / HMPID / AliHMPIDRecon.h
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d3da6dc4 1#ifndef AliHMPIDRecon_h
2#define AliHMPIDRecon_h
3
4/* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
5 * See cxx source for full Copyright notice */
6
7//////////////////////////////////////////////////////////////////////////
8// //
9// AliHMPIDRecon //
10// //
11// HMPID class to perfom pattern recognition based on Hough transfrom //
12// //
13//////////////////////////////////////////////////////////////////////////
14
15
16#include <TTask.h> //base class
17#include <TVector3.h> //fields
18
59280a5a 19class TClonesArray; //CkovAngle()
20class AliESDtrack; //CkovAngle()
21
d3da6dc4 22class AliHMPIDRecon : public TTask
23{
24public :
25 AliHMPIDRecon();
26 virtual ~AliHMPIDRecon() {}
27
611e810d 28
afe12692 29 void CkovAngle (AliESDtrack *pTrk,TClonesArray *pCluLst,Double_t nmean, Double_t qthre); //reconstructed Theta Cerenkov
a591e55f 30 Bool_t FindPhotCkov (Double_t cluX,Double_t cluY,Double_t &thetaCer,Double_t &phiCer ); //find ckov angle for single photon candidate
d3da6dc4 31 Double_t FindRingCkov (Int_t iNclus ); //best ckov for ring formed by found photon candidates
4598109f 32 Double_t FindRingArea (Double_t ckovAng )const;//estimated area of delta ring in cm^2 to weight Hough Transform
33 TVector2 IntWithEdge (TVector2 p1,TVector2 p2 )const;//find intercection between plane and lines of 2 thetaC
d3da6dc4 34 Int_t FlagPhot (Double_t ckov ); //is photon ckov near most probable track ckov
35 Double_t HoughResponse( ); //most probable track ckov angle
a591e55f 36 void Propagate (const TVector3 dir, TVector3 &pos,Double_t z )const;//propagate photon alogn the line
d3da6dc4 37 void Refract ( TVector3 &dir, Double_t n1, Double_t n2)const;//refract photon on the boundary
a591e55f 38 TVector2 TracePhot (Double_t ckovTh,Double_t ckovPh )const;//trace photon created by track to PC
39 TVector2 TraceForward (TVector3 dirCkov )const;//tracing forward a photon from (x,y) to PC
40 void RecPhot (TVector3 dirCkov,Double_t &thetaCer,Double_t &phiCer ); //theta,phi cerenkov reconstructed
4598109f 41 TVector2 GetMip ( )
42 {return fMipPos;} //mip coordinates
a591e55f 43 void SetTrack (Double_t xRad,Double_t yRad,Double_t theta,Double_t phi )
44 {fTrkDir.SetMagThetaPhi(1,theta,phi); fTrkPos.Set(xRad,yRad);} //set track parameter at RAD
45 void SetImpPC (Double_t xPc,Double_t yPc )
46 {fPc.Set(xPc,yPc);} //set track impact to PC
4598109f 47 void SetMip (Double_t xmip,Double_t ymip )
48 {fMipPos.Set(xmip,ymip);} //set track impact to PC
d3da6dc4 49 Double_t SigLoc (Double_t ckovTh,Double_t ckovPh,Double_t beta )const;//error due to cathode segmetation
50 Double_t SigGeom (Double_t ckovTh,Double_t ckovPh,Double_t beta )const;//error due to unknown photon origin
51 Double_t SigCrom (Double_t ckovTh,Double_t ckovPh,Double_t beta )const;//error due to unknonw photon energy
3b49956b 52 Double_t Sigma2 (Double_t ckovTh,Double_t ckovPh )const;//photon candidate sigma^2
59280a5a 53 enum ETrackingFlags {kMipDistCut=-9,kMipQdcCut=-5,kNoPhotAccept=-11};
611e810d 54// HTA hidden track algorithm
afe12692 55 Bool_t CkovHiddenTrk (AliESDtrack *pTrk,TClonesArray *pCluLst,Double_t nmean,Double_t qthre);//Pattern recognition without trackinf information
5b2b2013 56 Bool_t CluPreFilter (TClonesArray *pClu ); //Pre clustering filter to cut bkg clusters
57 Bool_t DoRecHiddenTrk (TClonesArray *pClu ); //Calling to the fitted procedures
43400d2d 58 Bool_t FitEllipse (Double_t &phiRec ); //Fit clusters with a conical section (kTRUE only for ellipses)
611e810d 59 Bool_t FitFree (Double_t phiRec ); //Fit (th,ph) of the track and ckovFit as result
43400d2d 60 Double_t FunConSect (Double_t *c,Double_t x,Double_t y ); //Function of a general conical section
5b2b2013 61 void SetNClu (Int_t nclu ) {fNClu=nclu;} //Setter for # of clusters
62 void SetClCk (Int_t i,Bool_t what ) {fClCk[i]=what;} //Setter for cluster flags
3b49956b 63 void SetCkovFit (Double_t ckov ) {fCkovFit=ckov;} //Setter for ckov fitted
64 void SetCkovSig2 (Double_t rms ) {fCkovSig2=rms;} //Setter for sigma2 ckov fitted
43400d2d 65 void SetTrkFit (Double_t th,Double_t ph ) {fThTrkFit = th;fPhTrkFit = ph;}//Setter for (th,ph) of the track
611e810d 66 void SetRadXY (Double_t x,Double_t y ) {fRadX = x;fRadY = y;} //Setter for (th,ph) of the track
43400d2d 67 static void FunMinEl (Int_t&/* */,Double_t* /* */,Double_t &f,Double_t *par,Int_t /* */); //Fit function to find ellipes parameters
611e810d 68 static void FunMinPhot(Int_t&/* */,Double_t* /* */,Double_t &f,Double_t *par,Int_t iflag); //Fit function to minimize thetaCer RMS/Sqrt(n) of n clusters
43400d2d 69 Int_t IdxMip ()const {return fIdxMip;} //Getter index of MIP
70 Double_t MipX ()const {return fMipX;} //Getter of x MIP in LORS
71 Double_t MipY ()const {return fMipY;} //Getter of y MIP in LORS
611e810d 72 Double_t MipQ ()const {return fMipQ;} //Getter of Q MIP
73 Double_t RadX ()const {return fRadX;} //Getter of x at RAD in LORS
74 Double_t RadY ()const {return fRadY;} //Getter of y at RAD in LORS
43400d2d 75 Int_t NClu ()const {return fNClu;} //Getter of cluster multiplicity
76 Double_t XClu (Int_t i)const {return fXClu[i];} //Getter of x clu
77 Double_t YClu (Int_t i)const {return fYClu[i];} //Getter of y clu
5b2b2013 78 Bool_t ClCk (Int_t i)const {return fClCk[i];} //Getter of cluster flags
43400d2d 79 Double_t CkovFit ()const {return fCkovFit;} //Getter of ckov angle fitted
80 Double_t ThTrkFit ()const {return fThTrkFit;} //Getter of theta fitted of the track
81 Double_t PhTrkFit ()const {return fPhTrkFit;} //Getter of phi fitted of the track
82//
394d35c1 83protected:
abb5f786 84 Double_t fRadNmean; //C6F14 mean refractive index
d3da6dc4 85 Int_t fPhotCnt; // counter of photons candidate
86 Int_t fPhotFlag[3000]; // flags of photon candidates
87 Double_t fPhotCkov[3000]; // Ckov angles of photon candidates, [rad]
88 Double_t fPhotPhi [3000]; // phis of photons candidates, [rad]
89 Double_t fPhotWei [3000]; // weigths of photon candidates
90 Double_t fCkovSigma2; // sigma2 of the reconstructed ring
91
43400d2d 92 Bool_t fIsWEIGHT; // flag to consider weight procedure
93 Float_t fDTheta; // Step for sliding window
94 Float_t fWindowWidth; // Hough width of sliding window
e0085eed 95
43400d2d 96 TVector3 fTrkDir; //track direction in LORS at RAD
97 TVector2 fTrkPos; //track positon in LORS at RAD
4598109f 98 TVector2 fMipPos; //mip positon for a given track
43400d2d 99 TVector2 fPc; //track position at PC
611e810d 100// HTA hidden track algorithm
43400d2d 101 Double_t fMipX; //mip X position for Hidden Track Algorithm
102 Double_t fMipY; //mip Y position for Hidden Track Algorithm
611e810d 103 Double_t fMipQ; //mip Q for Hidden Track Algorithm
104 Double_t fRadX; //rad X position for Hidden Track Algorithm
105 Double_t fRadY; //rad Y position for Hidden Track Algorithm
43400d2d 106 Int_t fIdxMip; //mip index in the clus list
107 Int_t fNClu; //n clusters to fit
5b2b2013 108 Double_t fXClu[100]; //container for x clus position
109 Double_t fYClu[100]; //container for y clus position
110 Bool_t fClCk[100]; //flag if cluster is used in fitting
43400d2d 111 Double_t fThTrkFit; //theta fitted of the track
112 Double_t fPhTrkFit; //phi fitted of the track
113 Double_t fCkovFit; //estimated ring Cherenkov angle
3b49956b 114 Double_t fCkovSig2; //estimated error^2 on ring Cherenkov angle
43400d2d 115//
611e810d 116private:
e0085eed 117 static const Double_t fgkRadThick; //radiator thickness
118 static const Double_t fgkWinThick; //window thickness
119 static const Double_t fgkGapThick; //proximity gap thickness
120 static const Double_t fgkWinIdx; //mean refractive index of WIN material (SiO2)
121 static const Double_t fgkGapIdx; //mean refractive index of GAP material (CH4)
611e810d 122
d3da6dc4 123 ClassDef(AliHMPIDRecon,0)
124};
cf7e313e 125
d3da6dc4 126#endif // #ifdef AliHMPIDRecon_cxx
127